A device designed for installation in the main riser of a dry or empty pipe automatic sprinkler system and held closed by spring force, air, or water pressure. Water is automatically released to the sprinkler system either by releasing or lowering the pressure beyond the minimum requirement or admitting and increasing the pressure to overcome the spring force.
Classification: Parts, nesoi, of mechanical appliances for projecting, dispersing or spraying liquids or powders; of fire extinguishers; of spray guns
NSN 5895-01-461-8287
NSN 5910-00-420-9057
NSN 6145-00-468-8534
NSN 5915-01-083-6301
NSN 5960-01-047-5155
NSN 5925-01-411-6028
NSN 6610-00-086-3840
NSN 5915-00-974-3646
NSN 5996-01-187-8571
NSN 5905-00-922-4892
NSN 6135-00-297-8873
NSN 5855-01-506-4610